port Matrix_TranslateRel

docs/progress.txt

@@ -40,7 +40,7 @@ typedef struct PHD_3DPOS {
 00401430    000000A8    +       void __cdecl Matrix_RotZ(int16_t rz);
 004014E0    000001DC    +       void __cdecl Matrix_RotYXZ(int16_t ry, int16_t rx, int16_t rz);
 004016C0    000001E7    +       void __cdecl Matrix_RotYXZpack(uint32_t rpack);
-004018B0    000000AB    -       sub_4018B0
+004018B0    000000AB    +       bool __cdecl Matrix_TranslateRel(int32_t x, int32_t y, int32_t z);
 00401960    0000007A    -       sub_401960
 004019E0    000000F3    -       sub_4019E0
 00401AE0    000000EA    -       sub_401AE0
@@ -1232,3 +1232,4 @@ typedef struct PHD_3DPOS {
 004BCB58    MATRIX g_MatrixStack[];
 004B2AC0    MATRIX g_W2VMatrix;
 0046C304    float g_ViewportAspectRatio = 0.0f;
+00478058    int32_t PhdFarZ;

src/game/matrix.c

@@ -5,6 +5,7 @@
 #include "global/const.h"
 #include "global/types.h"
 #include "global/vars.h"
+#include "util.h"
 
 #include <stdint.h>
 
@@ -270,3 +271,15 @@ void __cdecl Matrix_RotYXZpack(uint32_t rpack)
         mptr->_21 = r1 >> W2V_MATRIX;
     }
 }
+
+bool __cdecl Matrix_TranslateRel(int32_t x, int32_t y, int32_t z)
+{
+    struct MATRIX *mptr = g_MatrixPtr;
+    mptr->_03 += z * mptr->_02 + y * mptr->_01 + x * mptr->_00;
+    mptr->_13 += z * mptr->_12 + y * mptr->_11 + x * mptr->_10;
+    mptr->_23 += z * mptr->_22 + y * mptr->_21 + x * mptr->_20;
+
+    return (
+        ABS(mptr->_03) <= g_PhdFarZ && ABS(mptr->_13) <= g_PhdFarZ
+        && ABS(mptr->_23) <= g_PhdFarZ);
+}

src/game/matrix.h

@@ -2,6 +2,7 @@
 
 #include "global/types.h"
 
+#include <stdbool.h>
 #include <stdint.h>
 
 struct PHD_3DPOS;
@@ -15,3 +16,4 @@ void __cdecl Matrix_RotY(PHD_ANGLE ry);
 void __cdecl Matrix_RotZ(PHD_ANGLE rz);
 void __cdecl Matrix_RotYXZ(int16_t ry, int16_t rx, int16_t rz);
 void __cdecl Matrix_RotYXZpack(uint32_t rpack);
+bool __cdecl Matrix_TranslateRel(int32_t x, int32_t y, int32_t z);

src/global/vars.h

@@ -7,3 +7,4 @@
 #define g_MatrixStack ARRAY_(0x004BCB58, MATRIX, [])
 #define g_W2VMatrix VAR_U_(0x004B2AC0, MATRIX)
 #define g_ViewportAspectRatio VAR_I_(0x0046C304, float, 0.0f)
+#define g_PhdFarZ VAR_U_(0x00478058, int32_t)

src/inject_exec.c

@@ -14,6 +14,7 @@ static void Inject_Matrix(void)
     INJECT(0x00401430, Matrix_RotZ);
     INJECT(0x004014E0, Matrix_RotYXZ);
     INJECT(0x004016C0, Matrix_RotYXZpack);
+    INJECT(0x004018B0, Matrix_TranslateRel);
 }
 
 void Inject_Exec(void)

src/util.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#ifndef ABS
+    #define ABS(x) (((x) < 0) ? (-(x)) : (x))
+    #define MIN(x, y) ((x) <= (y) ? (x) : (y))
+    #define MAX(x, y) ((x) >= (y) ? (x) : (y))
+#endif